Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 357, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2022.131410
Keywords
Ti3C2 Mxene quantum dots; Nitrite; Fluorescence; Colorimetry; Test paper; Smartphone sensing
Funding
- National Natural Science Foundation of China [21707030]
- Wuhan Youth Science and Technology Plan [2016070204010133]
- Open Project Funding of the State Key Laboratory of Biocatalysis and Enzyme Engineering [SKLBEE2020017]
Ask authors/readers for more resources
Ti(3)C(2)MXene quantum dots (Ti(3)C(2)MQDs) have been synthesized and demonstrated green fluorescence, which can be used for colorimetric and fluorometric dual-modal recognition of nitrite (NO2-). Paper-based test strips were also made for real-time detection of NO2-.
Ti(3)C(2 & nbsp;)MXene quantum dots (Ti(3)C(2 & nbsp;)MQDs) are recognized as promising new nanomaterial recently, while the majority of the Ti(3)C(2 & nbsp;)MQDs manifest limited maximum emission in the blue-light range. Herein, the green fluorescence nitrogen, phosphorus-doped Ti(3)C(2 & nbsp;)MQDs (N, P-Ti(3)C(2 & nbsp;)MQDs) were synthesized via facile microwave assisted method, which greatly reduces the reaction time. The as-prepared N, P-Ti(3)C(2 & nbsp;)MQDs showed excitation dependent photoluminescence, anti-photobleaching, and favorable dispersibility. Interestingly, the fluorescence of N, P-Ti(3)C(2 & nbsp;)MQDs can be quenched by 1,10-phenanthroline-Fe (II) complex (Phen-Fe2+) via inner filter effect (IFE), accompanied by the increased orange color. After introduction of nitrite (NO2-), owing to the redox reaction between NO2- and Fe2+, the fluorescence will be recovered and the color varies from orange to colorless gradually. Therefore, a colorimetric/fluorometric dual-modal recognition of NO2- was fabricated based on N, Ti3C2 & nbsp; MQDs and Phen-Fe2+ complex. Moreover, paper-based test trips were facilely made by the N, P-Ti(3)C(2 & nbsp;)MQDs/Phen-Fe2+& nbsp; sensing system in response to ultrafast-response, real-time detection of NO2- with the assistant of smartphone. This study tendered a novel dual-channel method for real-time visual assay of NO2- as well as provided insightful research into functionalized Ti(3)C(2 & nbsp;)MQDs regarding in food analysis.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available